The brain.
The correct order from simplest to most complex would be: cells, tissues, organs, organ systems, human body.
The structures of the human body in order from least to most complex are cell, tissue, organ, and organ system.
The brain is the organ in the human body that uses the most energy.
Heart
The liver is the most heaviest organ in the human body; It is also the largest internal organ.
The most genetically complex structure in the human body is the brain.
Skin, although it is the least complex. Vision is the most complex.
The brain is the most diversified organ in the body. It is responsible for complex cognitive functions such as thinking, memory, and decision-making, as well as regulating basic bodily functions like breathing and heart rate. Additionally, the brain is composed of various regions that specialize in different tasks, allowing for a wide range of abilities and functions.
Most Complex Structure in the Universe is Your Brain
The levels of organization in the body from least complex to most complex are cells, tissues, organs, organ systems, and the whole organism. Cells are the most basic units of life, which combine to form tissues, then organs that work together in organ systems to support the body's overall function.
The brain
The levels of organization from least to most complex are:AtomsMoleculesCellTissueOrganOrgan system